It's the fake intro and menu system for a C64 adaptation of Game of Thrones that lures you into this clip, but once there, it's the music that really kicks your ass.

As any chiptune or C64 nut will tell you, the system was capable of some of the crunchiest effects the 1980s could muster, and they're in full force here as the show's theme song breaks down then wanders so far north of the Wall it's a wonder it ever found its way back again.